JPH0255717U - - Google Patents

Info

Publication number
JPH0255717U
JPH0255717U JP1988134511U JP13451188U JPH0255717U JP H0255717 U JPH0255717 U JP H0255717U JP 1988134511 U JP1988134511 U JP 1988134511U JP 13451188 U JP13451188 U JP 13451188U JP H0255717 U JPH0255717 U JP H0255717U
Authority
JP
Japan
Prior art keywords
temperature compensation
load
compensation circuit
temperature
drive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP1988134511U
Other languages
English (en)
Other versions
JPH0737369Y2 (ja
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1988134511U priority Critical patent/JPH0737369Y2/ja
Priority to US07/421,256 priority patent/US4980920A/en
Priority to EP19890119188 priority patent/EP0364930A3/en
Publication of JPH0255717U publication Critical patent/JPH0255717U/ja
Application granted granted Critical
Publication of JPH0737369Y2 publication Critical patent/JPH0737369Y2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/56—Modifications of input or output impedances, not otherwise provided for
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/007—Protection circuits for transducers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/03—Indexing scheme relating to amplifiers the amplifier being designed for audio applications
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/369—A negative impedance circuit being added to an amplifier circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)

Description

【図面の簡単な説明】
第１図は、この考案の一実施例に係る駆動装置
の基本構成を示すブロツク図、第２図は、第１図
の駆動装置の第１の具体例を示す回路図、そして
第３図は、第１図の駆動装置の第２の具体例を示
す回路図、第４図は、動電形電気音響変換器の駆
動系の等価回路図である。 １：駆動アンプ、２：負荷（負荷インピーダン
スＺｖ）、３：負荷電流検出素子（検出インピー
ダンスＺｓ）、４：帰還回路（伝達利得β）、５
：加算器、６：温度センサ、７：比較器または差
動増幅器、８：比較器、９：アツプ／ダウンカウ
ンタ、１０：入力ｆ特制御回路、１１：冷却素子
、Ｒｓ：検出抵抗（温度補償用）、Ｒ１，Ｒ２：
検出抵抗（温度補償低減用）。

Claims (1)

  1. 【実用新案登録請求の範囲】 負荷に流れる電流を検出して帰還し前記負荷を
    負性インピーダンス駆動するとともに前記負荷の
    温度上昇に伴う負荷インピーダンスの増大を補償
    すべく前記負性インピーダンス駆動状態を制御す
    るようにしてなる駆動装置の温度補償回路におい
    て、 前記負荷の温度が所定値に達したことを検出す
    る検出手段と、 この検出手段の出力に応じて前記温度補償回路
    の温度補償を停止させるかまたは温度補償率を低
    減させる手段と、 を具備することを特徴とする駆動装置の温度補償
    回路。
JP1988134511U 1988-10-17 1988-10-17 駆動装置の温度補償回路 Expired - Fee Related JPH0737369Y2 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP1988134511U JPH0737369Y2 (ja) 1988-10-17 1988-10-17 駆動装置の温度補償回路
US07/421,256 US4980920A (en) 1988-10-17 1989-10-13 Negative impedance driving apparatus having temperature compensation circuit
EP19890119188 EP0364930A3 (en) 1988-10-17 1989-10-16 Negative impedance driving apparatus having temperature compensation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988134511U JPH0737369Y2 (ja) 1988-10-17 1988-10-17 駆動装置の温度補償回路

Publications (2)

Publication Number Publication Date
JPH0255717U true JPH0255717U (ja) 1990-04-23
JPH0737369Y2 JPH0737369Y2 (ja) 1995-08-23

Family

ID=15130034

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988134511U Expired - Fee Related JPH0737369Y2 (ja) 1988-10-17 1988-10-17 駆動装置の温度補償回路

Country Status (3)

Country Link
US (1) US4980920A (ja)
EP (1) EP0364930A3 (ja)
JP (1) JPH0737369Y2 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007027821A (ja) * 2005-07-12 2007-02-01 Alpine Electronics Inc オーディオ装置

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0322798A (ja) * 1989-06-20 1991-01-31 Yamaha Corp パワーアンプ用アダプタ
US5764781A (en) * 1995-12-12 1998-06-09 Ding; Chih-Shun Speaker and amplifier system
US5729611A (en) * 1996-02-02 1998-03-17 Bonneville; Marc Etienne Loudspeader overload protection
US6104817A (en) * 1996-12-12 2000-08-15 Ding; Chih-Shun Speaker and amplifier system
US6625287B1 (en) * 1998-02-26 2003-09-23 Michael Wurtz Enhancing automatic noise reduction using negative output resistance
JP3296311B2 (ja) * 1998-12-25 2002-06-24 ヤマハ株式会社 音響装置
US20030194097A1 (en) * 2002-04-16 2003-10-16 Chih-Shun Ding Motional feedback for a speaker system
US7092536B1 (en) * 2002-05-09 2006-08-15 Harman International Industries, Incorporated System for transducer compensation based on ambient conditions
US7215766B2 (en) * 2002-07-22 2007-05-08 Lightspeed Aviation, Inc. Headset with auxiliary input jack(s) for cell phone and/or other devices
KR100532452B1 (ko) * 2003-07-22 2005-11-30 삼성전자주식회사 음성신호 재생 시스템 및 음성신호 재생방법
US7053705B2 (en) * 2003-12-22 2006-05-30 Tymphany Corporation Mixed-mode (current-voltage) audio amplifier
WO2008092111A2 (en) * 2007-01-26 2008-07-31 Jm Electronics Ltd. Llc Drivers and methods for driving a load
US8401207B2 (en) * 2009-03-31 2013-03-19 Harman International Industries, Incorporated Motional feedback system
JP5321263B2 (ja) * 2009-06-12 2013-10-23 ソニー株式会社 信号処理装置、信号処理方法
CN102347059A (zh) * 2010-08-04 2012-02-08 鸿富锦精密工业（深圳）有限公司 音频播放器及具有音频播放器的电子装置
US8983080B2 (en) * 2011-07-22 2015-03-17 Texas Instruments Incorporated Method and system for temperature protection of a speaker
EP2712209B1 (en) * 2012-09-21 2021-01-13 Dialog Semiconductor BV Method and apparatus for computing metric values for loudspeaker protection
TWI488099B (zh) * 2013-06-20 2015-06-11 Ind Tech Res Inst 觸控裝置及感測補償方法
US9837066B2 (en) 2013-07-28 2017-12-05 Light Speed Aviation, Inc. System and method for adaptive active noise reduction
CN107211218B (zh) * 2014-11-28 2021-05-18 奥德拉声学公司 高位移声学换能器系统
EP3121961B1 (en) * 2015-07-24 2019-04-03 Nxp B.V. Temperature sensing
IT201900015144A1 (it) * 2019-08-28 2021-02-28 St Microelectronics Srl Procedimento per monitorare carichi elettrici, circuito, amplificatore e sistema audio corrispondenti
KR20220046116A (ko) * 2020-10-07 2022-04-14 삼성전자주식회사 증폭기 및 증폭기를 포함하는 전자 장치

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3525812A (en) * 1969-05-08 1970-08-25 James E Verdier Transducer circuit and method of operation
DE2631792B2 (de) * 1976-07-15 1981-01-15 Braun Ag, 6000 Frankfurt Dynamischer Lautsprecher
NL8001592A (nl) * 1980-03-18 1981-10-16 Philips Nv Mfb systeem met een overnamenetwerk.
JPS56134807A (en) * 1980-03-24 1981-10-21 Toshiba Corp Acoustic reproducing device
US4550430A (en) * 1981-02-20 1985-10-29 Meyers Stanley T Sound reproducing system utilizing motional feedback and an improved integrated magnetic structure
JPS6014598A (ja) * 1983-07-05 1985-01-25 Matsushita Electric Ind Co Ltd スピ−カ
US4573189A (en) * 1983-10-19 1986-02-25 Velodyne Acoustics, Inc. Loudspeaker with high frequency motional feedback
US4614914A (en) * 1985-04-12 1986-09-30 Audio Precision, Inc. Low-distortion transformer-coupled circuit
US4837832A (en) * 1987-10-20 1989-06-06 Sol Fanshel Electronic hearing aid with gain control means for eliminating low frequency noise

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007027821A (ja) * 2005-07-12 2007-02-01 Alpine Electronics Inc オーディオ装置

Also Published As

Publication number Publication date
JPH0737369Y2 (ja) 1995-08-23
EP0364930A2 (en) 1990-04-25
US4980920A (en) 1990-12-25
EP0364930A3 (en) 1991-04-03

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees